Experiment: 3NYP

A bimolecular anti-parallel-stranded Oxytricha nova telomeric quadruplex in complex with a 3,6-disubstituted acridine ligand containing bis-3-fluoropyrrolidine end side chains

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1L1H	PDB entry 1L1H

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.5	285.15	The 5 Ul drop contained 1.2 mM quadruplex DNA, 1.2 mM ligand, 4% MPD, 4 mM potassium chloride, 4 mM magnesium chloride, 4 mM sodium chloride, 4 mM lithium sulphate, 3.2 mM spermine.4HCl and 16 mM potassium cacodylate buffer at pH 6.5. This was equilibrated against a reservoir well solution of 500 Ul of 45% MPD, VAPOR DIFFUSION, HANGING DROP, temperature 285.15K

Crystal Properties
Matthews coefficient	Solvent content
2.38	48.22

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 57.8	α = 90
b = 44.46	β = 90
c = 28.14	γ = 90

Symmetry
Space Group	P 21 21 2

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	105	CCD	ADSC QUANTUM 315		2009-08-09	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	DIAMOND BEAMLINE I04	0.9702	Diamond	I04

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	R Sym I (Observed)	Net I Over Average Sigma (I)	Redundancy	Number Reflections (All)	Number Reflections (Observed)	Observed Criterion Sigma (F)	Observed Criterion Sigma (I)	B (Isotropic) From Wilson Plot
1	1.18	21.99	97.7	0.051	0.051	15.5	3.6	23982	23982	2	2

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	1.18	1.24	97.8		0.12	0.12	5.7	3.5	3423

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	PDB entry 1L1H	1.179	21.99	0.04	23275	23275	1183	94.59	0.1658	0.1647	0.1588	0.1881	0.1803	Random	14.8626

Temperature Factor Modeling
Anisotropic B[1][1]	Anisotropic B[1][2]	Anisotropic B[1][3]	Anisotropic B[2][2]	Anisotropic B[2][3]	Anisotropic B[3][3]
1.5525			1.2304		-2.7829

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	31.085
f_angle_d	2.125
f_chiral_restr	0.141
f_bond_d	0.024
f_plane_restr	0.022

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms
Nucleic Acid Atoms	506
Solvent Atoms	177
Heterogen Atoms	40

Software

Software
Software Name	Purpose
MOSFLM	data reduction
SCALA	data scaling
PHENIX	refinement
PDB_EXTRACT	data extraction
PHASER	phasing